Machine for inserting fastenings



Nov329, 1932. F. c. EASTMAN MACHINE FOR\ INSERTING FASTENINGS Filed March 8, 1930 Patented Nov. 2 9, 1932 UNITED STATES PATENTS OFFICE FIRED C. EASTMAN, OF BEVERLY, MASSACHUSETTS, ASSIG'NOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY MACHINE FOR INSERTING FASTENINGS Application filed March 8, 1930. Serial No. 434,405.

This invention relates to improvements in fastening inserting machines and is illustrated herein with reference to a machine for inserting fibre fastenings into shoe parts.

The cementing of fibre fastenings into shoe parts is disclosed in Letters Patent of the United States No. 1,729,169, granted Sept. 24, 1929 on an application filed in the name of Fred N. LaChapelle, in which Letters Patent the application of water to the glue coated surface of fibre pegs before the pegs are driven into the shoe parts is illustrated. This practice has proved to be decidedly beneficial.

It is an object of the invention to provide improved mechanism forcontrolling the application of liquid, whether water or other suitable solvent, to a fastening the surface of which is of material which becomes adhesive when acted upon by the solvent.

In accordance with the foregoing the illustrated fibre fastening machine, which is of the type disclosed in Letters Patent of the United States No. 1,802,900, granted April 28, 1931 on application of Fred N. LaChapelle i and Fred G. Eastman, is provided Witha small pump operated in timed relation to the fastening severing and lnserting mechanism,

together with a conduit leading from the pump to the nozzle of the machine so that a i small amount of liquid is forced through the nozzle into the awl hole formed in the work immediately before each fastening is inserted. This obviates the possibility of a portion of the softened adhesive being wiped from the fastening before or as the fastening is inserted and, as means is provided for varying the plunger stroke of the pump, permits a nice control of the amount of liquid applied.

in connection with machines of the illustrated type. Nor is it necessary that the surface of the fastenings consist of a coating of glue. But it is essential to the practice of the invention that the surface of the fastening be tures in View the invention will now be de- 0 The invention is in no'way limited to use scribed in connection with'the accompanying drawing and pointed out in the claims.

In the drawing,

Fig. 1 is a side elevation of the head of a fastening inserting machine constructed and arranged to practice the improved method of the present invention and embodying my novel mechanism;

Fig. 2 is the front elevation of the lower pogtion of the head of the machine of F 1; an r Fig. 3 is a longitudinal section through the fastening inserting and liquid supplying mechanism of the machine.

The illustrated machine is provided with a head 10 carrying a throat member illustrated as a nozzle 12 having a driver passage 14: through which reciprocates a tool 16. The tool 16 is operated alternately as an awl and a driver by mechanism a portion of which is shown at 18 and which is operated from a cam member 20. A horizontally reciprocating plunger 22 (Fig. 3), also driven from the cam member 20 in timed relation to the tool 16, is provided near its forward end with a driver passage 24; into which the end of a strip of gluecoated fibre fastening material 26 is fed by mechanism indicated at 28 in Fig. 1. Reciprocation of the plunger 22 serves to shear a fastening from the strip 26 and to feedit into alinement with the driver passage 14 of the nozzle immediately after the tool 16 has been given an awl stroke to make a fastening receiving opening 30 (Fig. 3) in the work piece presented to the nozzle which, as illustrated, comprises a shoe 32 into the bottom 34 of which a fastening is to be inserted. The descent of the tool 16, which now acts as a driver, is effective to drive the fastening into the hole .30 in the shoe bot- For 'further details of the construction and operation of the illustrated machine reference may be had to said United States Patent No. 1,802,900, granted April 28, 1931, on application of Fred N LaGhapelle and Fred G. Eastman.

In accordance with the present invention, the illustrated machine is provided with a pump indicated generally at 40 in Figs. land 2, and shown in cross section in Fig. 3. This comprises a casing 42 having a cylindrical chamber 44 in which a plunger 46 is mounted for reciprocating movement. The plunger 46 is normally urged toward inoperative posit-ion (to the right as "iewed in Fig. 3) by a coiled spring 48 which bears at one end against a shoulder 50 formed on the exterior of the easing42 and at the other end against the head 52 of the plunger. The plunger 46 is reciprocated'from the cam member 20 through connections comprising a cam roll 54 positioned in a groove of the cam 20 and carried by a member 56 mounted for reciprocating movement in ways formed in the head of the machine. A screw 58, threaded-into a bracket 60 carried by the slide member 56, engages against the head 52 of the plunger 46 thereby reciprocating the plunger as the cam 20 rotates.

Liquid, for example water if glue-coated fibre fastenings are to be inserted, is supplied to the chamber 44 of the pump by a tube 62 one end of which is connected by a coupling 64 with the pump-casing 42 and the other end of which is coupled to a receptacle 66 clamped by a screw 68 to a rod 70 which in turn is clamped by a screw 72 to a container 84 supporting an inverted bottle 86. The container 84 is carried by a bracket 88 secured to the head 10 of the machine. ,Thus it will be ob served that a bottle of liquid may be inverted into position in the container 84 so that the receptacle 66 will be supplied with liquid to a uniform depth and will serve as a substantially continuous source of supply for the pump 40.

The outlet of the pump chamber 40 is normally closed by a'ball valve 88 (Fig. 3) located in a seat 90 at the end of the pump chamber 44 remote from the plunger 46, a,

spring 92 bearing at one end against the ball 88 and at the other end in a small chamber 94 formed in a plug 96 threaded into the pump :of liquid out of the pump chamber 44 and casing 42. A tube 98 is connected at one end to a coupling 100 threaded into the casing 42 of the pump at the outlet side of the ball valve 90, the other end of the tube 98 being connected by a short section of rubber tubing 102 to a. short tube 104 driven into a passageway 106 extending transversely into the driver passage 14 of the nozzle 12.

The arrangement is such that when the plunger 46 is moved to the left, as viewed in Fig. 3, it closes the outlet to tube 62 early in its stroke after which the pressure moves the ball 88 from its seat 90 against the compression of the spring 92 so that further movement of the plunger 46 forces a small amount,

. into the tube 98 through which it passes to the driver passage 14 of the nozzle 12, At

this time the plunger 22 has moved to the left sufliciently so that its end portion serves to close'the upper end of the driver passage 14 and the liquid is accordingly forced downwardly into the hole 30 which has been formed by the tool 16 for the reception of the peg which is about to be driven. At the start of the return stroke of the plunger 46 the ball 88 is returned to its seat 90 after which the movement of the plunger 22 to the left is completed and the fastening driven. Thus it will be observed that a small amount of solvent is forced into the hole 30 in the work piece. When the glue-coated fastening is driven immediately thereafter the glue is rendered adhesive by the water which has been forced into the hole 30 and the fastening is cemented into place.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

l. A fastening inserting machine having, in combination, means for forming fastening receiving holes in a work piece, a pump constructed and arranged to force liquid into the holes, and means operative thereafter to insert in the holes fastenings the surface material of which is such that it is rendered ad hesive by the action of the solvent, thereby to cement the fastenings in place.

2. A fastening inserting machine having, in combination, fastening inserting instrumentalities including a tool acting as an aw lvent, and means independent of the fastening inserting instrumentality for forcing a small amount of said solvent into each hole before the fastening is inserted therein.

4. A fastening inserting machine having, in combination, fastening inserting instrumentalities, means for presenting adhesive coated fastenings in driving relation to said fastening inserting instrumentalities, and a pump constructed and arranged to supply a small amount of solvent to soften the adhesive coating of each fastening.

5. A fastening inserting machine having, in combination, fastening inserting instrumentalities, means for presenting in driving relation to said instrumentalities fastenings the surfaces of which are of material which becomes adhesive when treated with a suit able solvent, a pump, and means for operating the pump to cause the pump to supply solvent to render adhesive the surface materia'lof each fastening inserted.

6. A fastening inserting machine having, in combination, fastening inserting instrumentalities including an awl operative to form fastening receiving holes in a work piece presented to said instrumentaliti-es, and a pump constructed and arranged to force a small amount of liquid into each hole formed by the awl in the work piece.

7. A fastening inserting machine having, in combination, fastening inserting instrumentalities having a work-engaging member provided with a driver passage, a tool reciprocating through said driver passage and constructed and arranged to operate first as an awl to form fastening receiving holes in a work piece presented thereto and then as a driver to drive a fastening into said hole, means for severing fastenings from an adhesive coated strip of fastening material and presenting them for insertion by the driver, a pump, a passageway leading from the pump to the nozzle, and means for operating the pump to cause the pump to force a small amount of liquid through the driver passage of the nozzle into each hole formed in the work piece by the reciprocating tool, prior to the driving of fastenings into the respective holes.

8. A fastening inserting machine having, in combination, fastening inserting instrumentalities including a throat member hav ing a driver passage, a tool reciprocating through said driver passage to form fastening receiving holes in a work piece presented to the throat member, a pump, a passageway leading from the pump to the throat member, means for operating the pump to cause the pump to force liquidthrough the driver passage of the throat member into each hole formed in the work piece by the reciprocating tool, and means for closing the end of the driver passage remote from the work at the time the pump isoperated thereby preventing the escape of liquid in that direction and insuring that the liquid will be forced into the hole when the pump is operated.

9. A fastening inserting machine having, in combination, fastening inserting instrumentalities including a nozzle having a driver passage, a tool reciprocating through said driver passage and acting as an awl to form V fastening receiving holes in a work piece presented to the nozzle, a reciprocating mem-' ber arranged to sever fastenings from an adhesive coated strip of fastening material and to present fastenings to the driver passage for insertion into the work piece, a pump, a passage-way leading from the pump to the nozzle, and means for operating the pump, the fastening transfer member being constructed and arranged to close the end of the driver passage remote from the work at the time the pump is operated thereby insuring that the pump will force the liquid through vent to moisten the surface of each fastening thereby rendering it adhesive including adjus'table means for reciprocating the plunger of the pump whereby the amount of solvent supplied can be varied according to the requirements of the fastenings which are to be inserted.

11. A fastening inserting machine having, in combination, an abutment member having a driver passage, a driver reciprocable through the passage to insert a fastening into the work piece, means for presenting in the driver passage for insertion by the driver fastenings the surfaces of which become adhesive when treated with a suitable solvent, a plunger pump, a cam, and connections between the cam and the plunger of the pump arranged to operate the pump to supply solvent to moisten the surface of each fastening thereby rendering it adhesive, said connections including an adjusting screw whereby the stroke of the pump plunger and the amount of solvent supplied for each fastening can be varied according to the requirements of the fastenings which are to be inserted.

12. A fastening inserting machine having, in combination, means for inserting in a work piece fastenings the surfaces of which are of material which becomes adhesive when treated with a suitable solvent, a pump operating to supply solvent for each fastening insorted and comprising a plunger and a spring urging the plunger toward its inoperative position, and means for reciprocating the plunger against the action of its spring to supply solvent to the fastenings and comprising a reciprocated screw bearing upon the plunger in opposition to its spring and adjustable to vary the stroke of the plunger.

In testimony whereof I have signed my name to this specification.

FRED C. EASTMAN. 

